the temperature of an ideal gas in a sealed 0.7 m^3 container is reduced from 340 k to 270 k. the final pressure of the gas is 40 kPa. The molar heat capacity at constant volume of the gas is 28.0 j/mol*k. the work done by the gas is closest to

Consider the following multistep reaction: a b→ab(slow) a ab→a2b(fast)−−−−−−−−−−−−−−−−− 2a b→a2b(overall) based on this mechanism, determine the rate law for the overall reaction. express your answer in standard masteringchemistry format. for example, if the rate law is k[a]3[b]2 type k*[a]^3*[b]^2